[PATCH] [lsan] Added __lsan_will_detect_leaks().

[Sergey Matveev]

  > does this interface play well with leak_check_at_exit runtime option?

  It doesn't, but there's nothing that can be done. We can't predict whether the user is going to call __lsan_do_leak_check() or not. Then again, leak_check_at_exit is kind of a hack itself. I don't think we are obligated to support the usage mode where leak_check_at_exit=0 and the user never calls __lsan_do_leak_check(), as that situation can only arise through misuse of the tool.

http://llvm-reviews.chandlerc.com/D1421

BRANCH
  feat/leak_detection_is_enabled

ARCANIST PROJECT
  compiler-rt